1 // <string> Forward declarations -*- C++ -*-
3 // Copyright (C) 2001-2021 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file bits/stringfwd.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{string}
31 // ISO C++ 14882: 21 Strings library
35 #define _STRINGFWD_H 1
37 #pragma GCC system_header
39 #include <bits/c++config.h>
40 #include <bits/memoryfwd.h>
42 namespace std
_GLIBCXX_VISIBILITY(default)
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
47 * @defgroup strings Strings
52 template<class _CharT
>
55 template<> struct char_traits
<char>;
57 #ifdef _GLIBCXX_USE_WCHAR_T
58 template<> struct char_traits
<wchar_t>;
61 #ifdef _GLIBCXX_USE_CHAR8_T
62 template<> struct char_traits
<char8_t
>;
65 #if __cplusplus >= 201103L
66 template<> struct char_traits
<char16_t
>;
67 template<> struct char_traits
<char32_t
>;
70 _GLIBCXX_BEGIN_NAMESPACE_CXX11
72 template<typename _CharT
, typename _Traits
= char_traits
<_CharT
>,
73 typename _Alloc
= allocator
<_CharT
> >
76 _GLIBCXX_END_NAMESPACE_CXX11
78 /// A string of @c char
79 typedef basic_string
<char> string
;
81 #ifdef _GLIBCXX_USE_WCHAR_T
82 /// A string of @c wchar_t
83 typedef basic_string
<wchar_t> wstring
;
86 #ifdef _GLIBCXX_USE_CHAR8_T
87 /// A string of @c char8_t
88 typedef basic_string
<char8_t
> u8string
;
91 #if __cplusplus >= 201103L
92 /// A string of @c char16_t
93 typedef basic_string
<char16_t
> u16string
;
95 /// A string of @c char32_t
96 typedef basic_string
<char32_t
> u32string
;
101 _GLIBCXX_END_NAMESPACE_VERSION
104 #endif // _STRINGFWD_H